Intertidal Monitoring of Pectenogammarus planicrurus in Cardigan Bay and Pen Llyn ar Sarnau Special Area of Conservation (SACs) 2004
There were numerous aims of this data capture. - To establish the presence and extent of Pectenogammarus planicrurus at two sites where it had previously been found. - To establish whether the amphipod was restricted to a localised habitat at the sites or whether it was present along the entire length of the shoreline, identify and map its presence and extent along the surf zone, estimate its abundance. - To take representative core samples for enumeration of P. planicrurus and Particle Size Analysis across the full extent of the biotope. The results of a Pectenogammarus planicrurus monitoring programme carried out at two sites- Pwllheli, Pen Llyn a'r Sarnau Special Area of Conservation (SACs) and Gilfach yr Halen, Cardigan Bay Special Area of Conservation (SACs). P. planicrurus had previously been found at these sites during Phase 1 surveys undertaken by Countryside Council for Wales (CCW) so the data collected contributed to an investigation into their continuing existence. P. planicrurus is the only amphipod which is a permanent resident of shingle beaches and is found in the intertidal zone of clean shingle beaches, often in the lee of obstacles such as rocky outcrops and groynes.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS101994
- Alternative Title
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- 2004 CCW / IECS Pen Llyn a'r Sarnau SAC Pectenogammarus planicrurus monitoring MRCCW3020000000C
- Monitro Rhynglanwol: Pectenogammarus planicrurus yn ACA Bae Ceredigion ac ACA Pen Llyn a'r Sarnau
- Metadata Language
- English
- Lineage
-
Pwllheli: Survey was undertaken by working two hours either side of low water with part of the survey on foot and part using a quad bike (distribution of the amphipod was more extensive than previously thought so use of a quad bike enabled sampling across the full extent of the beach within a single tidal window). Initial surveying aimed to establish the presence/absence of the species throughout the site and involved randomly chosen sample stations along the surf line (position of each station recorded using dGPS). At each station a shallow trough was dug and the number of P. planicrurus estimated using MNCR SACFOR abundance scales adapted for crustacea. Small amount of sediment was sieved as a secondary check if P. planicrurus not immediately visible. Sediment particle size and infaunal samples were taken away for analysis. Gilfach Yr Halen: Survey was undertaken on foot working two hours either side of low water. Sampling stations were located approx every 10m along edge of the surf zone (position of each station recorded using dGPS). Sediment type was noted at each station and where possible a shallow trough was dug to enumerate any P. planicrurus identified. When digging a trough was not possible (on mixed hard substrata) the under cobble/boulder, and fucoid habitats were examined.
- Dataset Reference Date (Publication)
- 2008-12-31
Temporal Extent
- Begin date
- 2003-09-04
- End date
- 2009-07-04
- Topic category
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- Biota
Extent
Extent
- Geographic Extent
- Caernarvonshire (49)
- Geographic Extent
- Merionethshire (48)
- Geographic Extent
- SIR CEREDIGION - CEREDIGION
- Geographic Extent
- Wales (WLS)
))
Vertical Extent
- Medin Extent Keyword
- benthic boundary layer
Distribution
- Format Type and Description
-
-
Geographic Information System
()
- Specification
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[A] Digital versions of the contract report: Microsoft Word document(s); and an equivalent Adobe Portable Document Format version [B] MapInfo GIS layer in MapInfo Native format (Tables): - Positions of survey stations at Pwllheli - Pen Llyn a'r Sarnau SAC. - Positions of survey stations at Gilfach yr Halen - Cardigan Bay SAC. - Translations from the above MapInfo Tables are retained in ESRI Shapefile and MapInfo Interchange formats. [C] Excel spreadsheets for Pectenogammarus planicrurus species abundance data. [D] Photographs from each location. [E] Marine Recorder file: MRCCW3020000000C
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Geographic Information System
()
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
-
Pwllheli: Survey was undertaken by working two hours either side of low water with part of the survey on foot and part using a quad bike (distribution of the amphipod was more extensive than previously thought so use of a quad bike enabled sampling across the full extent of the beach within a single tidal window). Initial surveying aimed to establish the presence/absence of the species throughout the site and involved randomly chosen sample stations along the surf line (position of each station recorded using dGPS). At each station a shallow trough was dug and the number of P. planicrurus estimated using MNCR SACFOR abundance scales adapted for crustacea. Small amount of sediment was sieved as a secondary check if P. planicrurus not immediately visible. Sediment particle size and infaunal samples were taken away for analysis. Gilfach Yr Halen: Survey was undertaken on foot working two hours either side of low water. Sampling stations were located approx every 10m along edge of the surf zone (position of each station recorded using dGPS). Sediment type was noted at each station and where possible a shallow trough was dug to enumerate any P. planicrurus identified. When digging a trough was not possible (on mixed hard substrata) the under cobble/boulder, and fucoid habitats were examined.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
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NRW Thesaurus
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- Cardigan Bay SAC
- gravel shore
- Pen Llyn a'r Sarnau SAC
- marine biology (subtidal biology) (littoral biology) (sublittoral biology)(intertidal biology)(see also seashore)
- Pwllheli
- Special Areas of Conservation (SAC) - SAC monitoring
- Pectenogammarus
- Gilfach yr Halen
- Type
- Theme
Citation
- Date (Publication)
- 2024-04-09
Keywords
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SeaDataNet Parameter Discovery Vocabulary
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- Zoobenthos taxonomic abundance
- Type
- Theme
Citation
- Date (Publication)
- 2024-03-28
Spatial Reference System
Content
Content Information
NRW Profile
Custom Elements
- NRW Related Title
-
Intertidal monitoring of pectenogammarus planicrurus in Cardigan Bay and Pen Llyn ar Sarnau SACs in 2004
Constraints
Constraints
Limitations on Public Access and Use
- Restriction type
- Other restrictions
Access Constraints Directive
- Limitations
- no limitations
Access Constraints Text
- Other constraints
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There are no access restrictions to this data. NRW may release, publish or disseminate it freely.
Use Constraints
- Use constraints type
- Other restrictions
- Other constraints
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© CNC/NRW 2009.There are no use restrictions on this data. Recipients may re-use, reproduce, disseminate this data free of charge in any format or medium, provided they do so accurately, acknowledging both the source and NRW's copyright, and do not use it in a misleading context. It is the recipient's responsibility to ensure the data is fit for the intended purpose, that dissemination or publishing does not result in duplication, and that it is fairly interpreted. Advice on interpretation should be sought where required. To avoid re-using old data, users should periodically obtain the latest version from the original source.
Metadata
Metadata
- File Identifier
- 4f4c4942-4343-5764-6473-313031393934 XML
- Metadata Language
- English
- Parent Identifier
-
Natural Resources Wales (NRW) Marine Benthic Species and Habitat Collation Held in Marine Recorder
NRW_DS114501
- Resource type
- Dataset
- Metadata Date
- 2024-05-31T10:55:40.577Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
-
1.0